Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons

doi:10.1088/1674-1056/20/2/024202

中国物理B ›› 2011, Vol. 20 ›› Issue (2): 24202-024202.doi: 10.1088/1674-1056/20/2/024202

Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons

杨剑¹, 赵天明¹, 张涵¹, 杨涛¹, 潘建伟¹, 包小辉²

(1)Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; (2)Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; Physikalisches Institut der Universitaet Heidelberg, Philosophenweg 12, Heidelberg 69120, G

收稿日期:2010-12-03 修回日期:2010-12-03 出版日期:2011-02-15 发布日期:2011-02-15
基金资助:
Project supported by the Science Foundation of the Chinese Academy of Sciences, the National Fundamental Research Program of China (Grant No. 2011CB921300) and the National Natural Science Foundation of China.

Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons

Yang Jian(杨剑)^a), Zhao Tian-Ming(赵天明)^a), Zhang Han(张涵)^a), Yang Tao(杨涛)^a), Bao Xiao-Hui(包小辉)^a)b)†, and Pan Jian-Wei(潘建伟)^a)

^a Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; ^b Physikalisches Institut der Universitaet Heidelberg, Philosophenweg 12, Heidelberg 69120, Germany

Received:2010-12-03 Revised:2010-12-03 Online:2011-02-15 Published:2011-02-15
Supported by:
Project supported by the Science Foundation of the Chinese Academy of Sciences, the National Fundamental Research Program of China (Grant No. 2011CB921300) and the National Natural Science Foundation of China.

摘要/Abstract

摘要： In this paper, we report an interesting phenomenon when precisely adjust the tuning crystal for double-resonance of a type-II configured parametric amplifier cavity, which is later verified as a cavity-enhanced effect in optics alignment. The theoretical result indicates that an angle accuracy error within 0.09^o is necessary to achieve a high contrast ratio of 100:1 for a cavity with a finesse of about 205, which is crucial but high-demanding to get a high-quality narrowband entanglement source. Meanwhile, we figure out a method to release such a high requirement and get high visibility in a moderate-accuracy alignment.

关键词: optics alignment, double-resonance, cavity-enhanced, narrowband entanglement

Abstract: In this paper, we report an interesting phenomenon when precisely adjust the tuning crystal for double-resonance of a type-II configured parametric amplifier cavity, which is later verified as a cavity-enhanced effect in optics alignment. The theoretical result indicates that an angle accuracy error within 0.09^o is necessary to achieve a high contrast ratio of 100:1 for a cavity with a finesse of about 205, which is crucial but high-demanding to get a high-quality narrowband entanglement source. Meanwhile, we figure out a method to release such a high requirement and get high visibility in a moderate-accuracy alignment.

Key words: optics alignment, double-resonance, cavity-enhanced, narrowband entanglement

中图分类号: (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)

42.50.Nn

42.50.Ex (Optical implementations of quantum information processing and transfer) 03.67.Bg (Entanglement production and manipulation)

杨剑, 赵天明, 张涵, 杨涛, 包小辉, 潘建伟. Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons[J]. 中国物理B, 2011, 20(2): 24202-024202.

Yang Jian(杨剑), Zhao Tian-Ming(赵天明), Zhang Han(张涵), Yang Tao(杨涛), Bao Xiao-Hui(包小辉), and Pan Jian-Wei(潘建伟). Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons[J]. Chin. Phys. B, 2011, 20(2): 24202-024202.

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Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons

Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons

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